package com.kokomi.controller;

import com.alibaba.fastjson2.JSONObject;
import com.alipay.easysdk.factory.Factory;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.kokomi.config.AliPayConfig;
import com.kokomi.mapper.OrderMapper;
import com.kokomi.pojo.Order;
import com.kokomi.pojo.enumeration.OrderStatus;
import com.kokomi.service.BookService;
import com.kokomi.service.ItemService;
import com.kokomi.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.kokomi.pojo.Item;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/alipay")
@Transactional(rollbackFor = Exception.class)
public class AliPayController {

    @Resource
    AliPayConfig aliPayConfig;
    @Autowired
    OrderService orderService;
    @Autowired
    ItemService itemService;


    @Resource
    private OrderMapper shopOrderMapper;
    private static final String GATEWAY_URL = "https://openapi-sandbox.dl.alipaydev.com/gateway.do";
    private static final String FORMAT = "JSON";
    private static final String CHARSET = "utf-8";
    private static final String SIGN_TYPE = "RSA2";
    @Autowired
    private BookService bookService;

    @GetMapping("/pay") // &subject=xxx&traceNo=xxx&totalAmount=xxx
    public void pay(String id, HttpServletResponse httpResponse) throws Exception {
        AlipayClient alipayClient = new DefaultAlipayClient(GATEWAY_URL, aliPayConfig.getAppId(),
                aliPayConfig.getAppPrivateKey(), FORMAT, CHARSET, aliPayConfig.getAlipayPublicKey(), SIGN_TYPE);

        Order order = orderService.getById(id);

        AlipayTradePagePayRequest request = new AlipayTradePagePayRequest();
        request.setNotifyUrl(aliPayConfig.getNotifyUrl());
        JSONObject bizContent = new JSONObject();
        bizContent.put("out_trade_no", order.getOrderNum());
        bizContent.put("total_amount", order.getTotalPrice());
        bizContent.put("subject", "蜗牛图书");
        bizContent.put("product_code", "FAST_INSTANT_TRADE_PAY");
        request.setBizContent(bizContent.toJSONString());
        request.setReturnUrl("http://localhost:9000/");
        String form = "";
        try {
            // 调用SDK生成表单
            form = alipayClient.pageExecute(request).getBody();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        httpResponse.setContentType("text/html;charset=" + CHARSET);
        // 直接将完整的表单html输出到页面
        httpResponse.getWriter().write(form);
        httpResponse.getWriter().flush();
        httpResponse.getWriter().close();
    }

    @PostMapping("/notify")  // 注意这里必须是POST接口
    public String payNotify(HttpServletRequest request) throws Exception {
        if (request.getParameter("trade_status").equals("TRADE_SUCCESS")) {
            System.out.println("=========支付宝异步回调========");

            Map<String, String> params = new HashMap<>();
            Map<String, String[]> requestParams = request.getParameterMap();
            for (String name : requestParams.keySet()) {
                params.put(name, request.getParameter(name));
                // System.out.println(name + " = " + request.getParameter(name));
            }

            String tradeNo = params.get("out_trade_no");
            String gmtPayment = params.get("gmt_payment");
            String alipayTradeNo = params.get("trade_no");
            // 支付宝验签
            if (Factory.Payment.Common().verifyNotify(params)) {
                // 验签通过
                System.out.println("交易名称: " + params.get("subject"));
                System.out.println("交易状态: " + params.get("trade_status"));
                System.out.println("支付宝交易凭证号: " + params.get("trade_no"));
                System.out.println("商户订单号: " + params.get("out_trade_no"));
                System.out.println("交易金额: " + params.get("total_amount"));
                System.out.println("买家在支付宝唯一id: " + params.get("buyer_id"));
                System.out.println("买家付款时间: " + params.get("gmt_payment"));
                System.out.println("买家付款金额: " + params.get("buyer_pay_amount"));
                // 更新订单状态为已支付
                // 通过订单号查询订单
                Order order = orderService.getOne(new QueryWrapper<Order>().eq("order_num", tradeNo));

                order.setState(OrderStatus.NO_SEND.getCode());
                orderService.updateById(order);
                System.out.println("修改订单状态为已支付成功");

                // 更新库存
                // 1. 获取订单下的所有商品和数量
                QueryWrapper<Item> queryWrapper = new QueryWrapper<>();
                queryWrapper.eq("order_id", order.getId().toString());
                List<Item> items = itemService.list(queryWrapper);
                for (Item item : items) {
                    Long bookId = item.getBookId();
                    Integer buyCount = item.getBuyCount();
                    // 2. 获取商品库存
                    bookService.update().eq("id", bookId)
                            .setSql("store_count = store_count - " + buyCount)
                            .update();
                }

            }
        }
        return "success";
    }
}
